Background technology
At present in third generation collaborative project (third generation partnership project, 3gpp) network rack
Machine type communication (machine type communications, mtc) framework, wherein service capability server is introduced in structure
(services capability server, scs) increased new node and 3gpp core net between is mtc interlink server
(interworking function, mtc-iwf), the Main Function of mtc-iwf is to mtc server (server) shielding
The topological structure of 3gpp network, provides the interface with 3gpp network.
The framework of mtc system as shown in figure 1, scs only with local public land mobile network (home public land
Mobile network, hplmn) mtc-iwf have connection, that is, mtcsp interface is connecing of the mtc-iwf of scs and hplmn
Mouthful.The mtc-iwf of hplmn and visited Public Land mobile network (visited public land mobile network,
Vplmn service gprs supporting node (serving gprs support node, sgsn)), Mobility Management Entity
(mobility management entity, mme), mobile services switching centre (mobile services switching
Center, msc) between there may be roaming interface t5a, t5b, t5c.In Fig. 1, ue is terminal (user equipment), ran
For Radio Access Network (radio access network), s-gw is gateway (serving gateway), ip-sm-gw
For ip short messaging gateway (ip-short message-gateway), smc-sc/gmsc/iwmsc is in Short Message Service business
The heart/gateway media switching centre/interoperability media exchange center, sme is Short Message Entity (short message entity),
Cdf is charging data function entity (charging data function), and cgf is charging gateway function body (charging
Gateway function), hss is home signature user server (home subscriber server), and ggsn is gateway
Gprs supporting node (gateway gprs support node), p-gw is packet data gateway (packet data
Network-gateway), as is application server (application server).
In 3gpp ts23.682 specification under roaming scence based on t4 interface realize triggering terminal flow process define as
Draw a conclusion, as shown in Fig. 2 being described in detail below:
Step 1, scs are needing triggering terminal, so that terminal and network side are set up when communicating to connect, if scs does not have
The contact details of mtc-iwf, then the outer logo of using terminal is from name server (directory name
Service, dns) inquire about ip address and the port numbers obtaining mtc-iwf.
Step 2, scs send terminal triggering request to mtc-iwf, comprise terminal in this terminal triggering request
The information such as outer logo, life cycle, priority and scs id.
Step 3, mtc-iwf check whether the whether authorized transmission triggering message of scs and scs ask beyond submitting to trigger
The quota asked or speed.If the inspection failure of mtc-iwf, return error reporting and stop flow process.
Step 4, mtc-iwf send user information request (subscriber information request) to hss and disappear
Breath, sends triggering message to check whether scs is authorized to counterpart terminal, and obtains the imsi of terminal and the service that terminal is current
The mark of node (serving node).
Step 5, hss send user profile response (subscriber information response) message to scs.
If the reason in user profile response message (cause) value instruction scs do not allow to counterpart terminal send triggering message or
There is no effective CAMEL-Subscription-Information, then mtc-iwf transmission failed message to scs and stops flow process.
Step 6a, mtc-iwf selects the transmission means of triggering message, if selected for t5 terminal trigger message transmission side
Formula, then mtc-iwf execution t5 terminal trigger message transfer process.
If the failure of step 6b t5 terminal trigger message transfer process, or select t4 terminal trigger message transmission means, then
Mtc-iwf executes t4 terminal trigger message transfer process.
Step 7, mtc-iwf to scs send terminal triggering report, terminal triggering report in the reason value indicate trigger request
Accepted, be transmitted or bust thiss.
Step 8, terminal receive terminal triggering (device trigger) message when, according to the triggering load in this message
The content execution certain operations in (trigger payload) domain, include initiating at once or after a while and scs or application server (as)
Communication process.
It can be seen that, in prior art, when ue is in roaming state, if as needs to trigger ue, as can be by scs to hplmn
Mtc-iwf send terminal triggering request, when terminal triggering request reach mtc-iwf after, mtc-iwf pass through inquiry
Hss obtains the current service node of terminal, is then sent terminal trigger message by service node, now needs
Set up the connection of t5a/t5b/t5c interface between the sgsn/mme/msc of mtc-iwf and vplmn of hplmn, so can cause with
Lower 2 points of problems:
The mtc-iwf of first, hplmn needs to set up and safeguard the company and the too many sgsn/mme/msc of vplmn between
Connect, cause the expense of the signaling of the mtc-iwf of hplmn and resource larger.
Second, after the mtc-iwf of hplmn triggers ue failure by certain service node of vplmn, the service of this vplmn
Node needs failed message is passed back the mtc-iwf of hplmn, then mtc-iwf just can retry by vplmn other
Serving node carries out the triggering of terminal, so causes between different plmn frequently Signalling exchange, wastes signal resource.
Content of the invention
The embodiment of the present invention provides a kind of machine type communication system and its data transmission method and equipment, for reducing difference
Signalling exchange between plmn, to save signal resource.
A kind of machine type mtc communication system, this system includes:
It is arranged on the service capability server scs of local public land mobile network hplmn and former mtc interlink server
Mtc-iwf, and be arranged on visited Public Land mobile network vplmn act on behalf of mtc-iwf and core network control equipment;Its
In, described former mtc-iwf is connected with described scs and the described mtc-iwf that acts on behalf of, described act on behalf of mtc-iwf also with described core net
Control device is connected;
Described former mtc-iwf, for described acting on behalf of mtc- by receiving to be sent to from the downstream message of described scs
iwf;It is sent to described scs by receiving from the described upstream message acting on behalf of mtc-iwf;
Described act on behalf of mtc-iwf, for the downstream message receiving from described former mtc-iwf is sent to described core
Heart network control control equipment;It is sent to described former mtc-iwf by receiving from the upstream message of described core network control equipment;
Described core network control equipment, for sending out receiving from the described downstream message acting on behalf of mtc-iwf
Go;The upstream message that the terminal receiving is sent is sent to described acts on behalf of mtc-iwf.
A kind of former mtc-iwf, this former mtc-iwf includes:
Downlink transfer unit, for receiving the downstream message from scs, is sent to and acts on behalf of mtc-iwf;This is former
Mtc-iwf is the mtc-iwf arranging in the hplmn of terminal, and described agency in the vplmn that mtc-iwf is currently located for terminal sets
The mtc-iwf putting;
Uplink unit, for by receive be sent to from the described upstream message acting on behalf of mtc-iwf described
scs.
One kind acts on behalf of mtc-iwf, and this is acted on behalf of mtc-iwf and includes:
Downlink transfer unit, for by receive from the downstream message of former mtc-iwf be sent to core net control set
Standby;Described former mtc-iwf is the mtc-iwf arranging in the hplmn of terminal, and this acts on behalf of what mtc-iwf was currently located for terminal
The mtc-iwf of setting in vplmn;
Uplink unit, for by receive be sent to from the upstream message of core network control equipment described former
mtc-iwf.
A kind of core network control equipment, this core network control equipment includes:
Downlink transfer unit, for sending the downstream message receiving from acting on behalf of mtc-iwf;Described agency
The mtc-iwf of setting in the vplmn that mtc-iwf is currently located for terminal;
Uplink unit, the upstream message for sending the terminal receiving is sent to described acts on behalf of mtc-iwf.
A kind of data transmission method under roaming scence, the method includes:
The former mtc-iwf being arranged in hplmn will receive the downstream message from scs, be sent to and act on behalf of mtc-
iwf;The described mtc-iwf acting on behalf of setting in the vplmn that mtc-iwf is currently located for terminal;And,
Described former mtc-iwf is sent to described scs from the described upstream message acting on behalf of mtc-iwf by receiving.
A kind of data transmission method under roaming scence, the method includes:
The downstream message receiving from former mtc-iwf is sent to core by the mtc-iwf that acts on behalf of being arranged in vplmn
Network control control equipment;Described former mtc-iwf is the mtc-iwf arranging in the hplmn of terminal;
Described act on behalf of mtc-iwf and be sent to described former mtc- from the upstream message of core network control equipment by receiving
iwf.
A kind of data transmission method under roaming scence, the method includes:
The downstream message receiving from acting on behalf of mtc-iwf is sent by core network control equipment;Described agency
The mtc-iwf of setting in the vplmn that mtc-iwf is currently located for terminal;
The upstream message that the terminal receiving sends is sent to and described acts on behalf of mtc-iwf by described core network control equipment.
In scheme provided in an embodiment of the present invention, vplmn increases setting and acts on behalf of mtc-iwf, the former mtc- in hplmn
By acting on behalf of the core network control equipment that downstream message is sent in vplmn by mtc-iwf, the core net in vplmn controls iwf
Upstream message is sent to former mtc-iwf by acting on behalf of mtc-iwf by equipment, namely the former mtc-iwf in hplmn passes through agency
Core network control equipment in mtc-iwf and vplmn carry out data transmission it is seen that the former mtc-iwf in hplmn do not need with
Each core network control equipment in vplmn is set up and is safeguarded and connects, thus decreasing the Signalling exchange between different plmn, saves
Signal resource.
Specific embodiment
In order to reduce the Signalling exchange between different plmn, to save signal resource, the embodiment of the present invention provides a kind of mtc
Communication system.In the system, vplmn increases setting and acts on behalf of mtc-iwf, the mtc-iwf in hplmn is that former mtc-iwf leads to
Cross and act on behalf of mtc-iwf, carry out data transmission with the core network control equipment in vplmn.
Referring to Fig. 3, mtc communication system provided in an embodiment of the present invention, comprising: be arranged on the scs30 and former mtc- of hplmn
Iwf31, and be arranged on vplmn act on behalf of mtc-iwf31 and core network control equipment 33;Wherein, former mtc-iwf31 with
Scs30 is connected with acting on behalf of mtc-iwf32, act on behalf of mtc-iwf32 also with core network control equipment 33 and Short Message Service Center (example
As smc-sc/gmsc/iwmsc) it is connected;Herein, hplmn is the plmn of endpoint registration, and vplmn is currently located for terminal
plmn.Specific:
Former mtc-iwf31, for by receive from scs30, need the downstream message being sent to terminal to be sent to
Act on behalf of mtc-iwf32;The upstream message receiving from acting on behalf of mtc-iwf is sent to scs;
Act on behalf of mtc-iwf32, for being sent to core net control from the downstream message of former mtc-iwf31 by receiving
Equipment 33;It is sent to former mtc-iwf31 by receiving from the upstream message of core network control equipment 33;
Core network control equipment 33, for sending the downstream message receiving from acting on behalf of mtc-iwf32;Will
The upstream message that the terminal receiving sends is sent to acts on behalf of mtc-iwf32.Here, core network control equipment bag can include
One or more of msc, mme, sgsn.
Further, this system also includes the home signature user server (hss) 34 being connected with former mtc-iwf31;
Accordingly, former mtc-iwf31 is additionally operable to: by receive from scs30, need to be sent to the descending of terminal
Message is sent to before acting on behalf of mtc-iwf32, obtains the information of the service node of this terminal from hss34, according to the service obtaining
The information of node judges whether this terminal is in roaming state, when being judged as YES, downstream message is sent to and acts on behalf of mtc-
Iwf32, when being judged as NO, sends downstream message according to existing procedure.It should be noted that the service node of terminal is terminal
One or more of plmn being currently located core network control equipment;This terminal is judged according to the information of the service node obtaining
The method whether being in roaming state is: if the service node of this terminal is the core network control equipment of hplmn, this terminal is not
It is in roaming state, otherwise, this terminal is in roaming state.
Further, former mtc-iwf31 is additionally operable to: before being sent to downstream message and acting on behalf of mtc-iwf32, according to obtaining
The information of the service node obtaining, searches information (the such as address letter acting on behalf of mtc-iwf serving this service node in vplmn
Breath), and according to the information finding, downstream message is sent to and acts on behalf of mtc-iwf32.Here, according to the service node obtaining
Information, searches the information acting on behalf of mtc-iwf serving this service node in vplmn, can be specifically to search vplmn from dns
In serve the information acting on behalf of mtc-iwf of this service node, now need in advance in dns configuration service each in vplmn
The information acting on behalf of mtc-iwf of core network control equipment;Or or search in vplmn from local configuration information
Serve the information acting on behalf of mtc-iwf of this service node, now need to serve each core in vplmn locally configured in advance
The information acting on behalf of mtc-iwf of network control control equipment.
Further, former mtc-iwf31 is additionally operable to: before downstream message be sent to acting on behalf of mtc-iwf32, using as
The information (such as address information) of the core network control equipment of the service node of terminal, carries in downstream message;
Accordingly, act on behalf of mtc-iwf32 to be additionally operable to: the downstream message receiving from former mtc-iwf31 is being sent
Information (the such as address letter of core network control equipment before core network control equipment 33, is obtained by parsing downstream message
Breath), downstream message is sent to by core network control equipment 33 according to the information that parsing obtains.
Further, core network control equipment 33 is additionally operable to: is sent in the upstream message sending the terminal receiving
Before acting on behalf of mtc-iwf32, international mobile subscriber identification code (imsi) according to this terminal carrying in upstream message, judging should
Whether terminal is in roaming state, when being judged as YES, upstream message is sent to and acts on behalf of mtc-iwf32, when being judged as NO
Send upstream message according to existing procedure.
Further, core network control equipment 33 is additionally operable to: before upstream message be sent to acting on behalf of mtc-iwf32,
Information (the such as address letter acting on behalf of mtc-iwf serving this core network control equipment is searched from local configuration information
Breath), and according to the information finding, upstream message is sent to and acts on behalf of mtc-iwf32.
Further, act on behalf of mtc-iwf32 to be additionally operable to: disappearing receiving from the up of core network control equipment 33
Before breath is sent to former mtc-iwf31, according to the relevant information carrying in upstream message, search setting in the hplmn of terminal
The information of former mtc-iwf, and described upstream message is sent to by described former mtc-iwf31 according to the information finding;Here, root
According to the relevant information carrying in upstream message, search the information of the former mtc-iwf of setting in the hplmn of terminal, can be specifically
Outer logo according to the terminal carrying in upstream message or other information (the total quality domain name of such as mtc-iwf
(fqdn) information of the former mtc-iwf of setting the hplmn of terminal), is searched from dns, or, look into from local configuration information
Look for the information of the former mtc-iwf of setting in the hplmn of terminal.
Act on behalf of mtc-iwf32 to be used for: by the interface of acting on behalf of foundation between mtc-iwf32 and former mtc-iwf31 (for example
Tpm interface), it is sent to former mtc-iwf31 by receiving from the upstream message of core network control equipment 33;This interface be
Former mtc-iwf31 sends, to acting on behalf of mtc-iwf32, the interface set up during downstream message.
Downstream message in the present invention can be terminal trigger message etc.;Upstream message can be to this terminal trigger message
Terminal triggering report etc..
Act on behalf of mtc-iwf32 receive terminal triggering report after, if according to this terminal triggering report judge terminal triggering
The bust thiss of message, then be not sent to the triggering report of this terminal the former mtc-iwf31 in hplmn, but reselect it
His core network control equipment, and terminal trigger message is sent, thus keeping away by the core network control equipment reselecting
Exempted from the former mtc-iwf31 triggering report of the terminal of bust thiss being sent in hplmn, further reduce different plmn it
Between signalling, save signal resource.If judge the transmission success of terminal trigger message according to the triggering report of this terminal,
The triggering report of this terminal is sent to the former mtc-iwf31 in hplmn.
Referring to Fig. 4, the embodiment of the present invention provides a kind of former mtc-iwf, this former mtc-iwf to include:
Downlink transfer unit 40, for receiving from downstream message scs, needing to be sent to terminal, sends
Acted on behalf of mtc-iwf;This former mtc-iwf is the mtc-iwf arranging in the hplmn of terminal, acts on behalf of mtc-iwf for the current institute of terminal
Vplmn in setting mtc-iwf;
Uplink unit 41, for being sent to scs by the upstream message receiving from acting on behalf of mtc-iwf.
Further, this former mtc-iwf also includes:
Roaming judging unit 42, before downstream message is sent to and acts on behalf of mtc-iwf by downlink transfer unit, obtains from hss
Obtain the information of the service node of terminal, judge whether terminal is in roaming state according to the information of the service node obtaining;
Described downlink transfer unit 40 is used for: in when being judged as YES of judging unit of roaming, downstream message is sent to generation
Reason mtc-iwf;When being judged as NO, send downstream message according to existing procedure.It should be noted that the service node of terminal is
One or more of the plmn that terminal is currently located core network control equipment;Information according to the service node obtaining judges should
The method whether terminal is in roaming state is: if the service node of this terminal is the core network control equipment of hplmn, this is eventually
End is not in roaming state, and otherwise, this terminal is in roaming state.
Further, this former mtc-iwf also includes:
Information searching unit 43, before downstream message being sent to and acts on behalf of mtc-iwf in downlink transfer unit, according to
The information of the service node that roaming judging unit obtains, searches the letter acting on behalf of mtc-iwf serving this service node in vplmn
Breath;Here, the information according to the service node obtaining, searches the letter acting on behalf of mtc-iwf serving this service node in vplmn
Breath, can be specifically to search, from dns, the information acting on behalf of mtc-iwf serving this service node vplmn;Or it is also possible to
It is to search the information acting on behalf of mtc-iwf serving this service node in vplmn from local configuration information.
Accordingly, downlink transfer unit 40 is used for: the information being found according to information searching unit, and downstream message is sent
Acted on behalf of mtc-iwf.
Further, downlink transfer unit 40 is additionally operable to:
Before downstream message is sent to acting on behalf of mtc-iwf, the core net of the service node as terminal is controlled and sets
Standby information, carries in downstream message, for follow-up downstream message transmission.
Referring to Fig. 5, the embodiment of the present invention provides one kind to act on behalf of mtc-iwf, and this is acted on behalf of mtc-iwf and includes:
Downlink transfer unit 50, for being sent to core net control from the downstream message of former mtc-iwf by receiving
Equipment;Former mtc-iwf is the mtc-iwf arranging in the hplmn of terminal, acts on behalf of in the vplmn that mtc-iwf is currently located for terminal
The mtc-iwf of setting;
Uplink unit 51, for being sent to former mtc- from the upstream message of core network control equipment by receiving
iwf.
Further, this is acted on behalf of mtc-iwf and also includes:
Message parsing unit 52, for sending out the downstream message receiving from former mtc-iwf in downlink transfer unit
The information of core network control equipment before giving core network control equipment, is obtained by parsing downstream message;
Accordingly, downlink transfer unit 50 is used for: the information being obtained according to message parsing unit parsing, and downstream message is sent out
Give core network control equipment.
Further, this is acted on behalf of mtc-iwf and also includes:
Information searching unit 53, for disappearing receiving from the up of core network control equipment in uplink unit
Before breath is sent to former mtc-iwf, according to the relevant information carrying in upstream message, search setting in the hplmn of this terminal
The information of former mtc-iwf;Here, according to the relevant information carrying in upstream message, in the hplmn of lookup terminal, setting is former
The information of mtc-iwf, can be specifically outer logo according to the terminal carrying in upstream message or other information (such as
The fqdn of mtc-iwf), the information of the former mtc-iwf of setting the hplmn of terminal is searched from dns, or, from local configuration
The information of the former mtc-iwf of setting in the hplmn of terminal is searched in information.Accordingly, uplink unit 51, for according to letter
The information that breath searching unit finds, upstream message is sent to described former mtc-iwf.Or,
Uplink unit 51 is used for: the interface acting on behalf of foundation between mtc-iwf and former mtc-iwf by this, will connect
The upstream message from core network control equipment receiving is sent to former mtc-iwf;This interface is to this agency in former mtc-iwf
Mtc-iwf sends the interface set up during downstream message.
When the upstream message that the uplink unit 51 acting on behalf of mtc-iwf receives is for terminal triggering report, if according to
The triggering report of this terminal judges the bust thiss of terminal trigger message, then the triggering report of this terminal is not sent in hplmn
Former mtc-iwf, but reselect other core network control equipment, and by the core network control equipment that reselects by terminal
Triggering message sends, thus avoiding the former mtc-iwf being sent to the terminal triggering report of bust thiss in hplmn,
Further reduce the signalling between different plmn, save signal resource.If being judged eventually according to the triggering report of this terminal
The transmission success of end triggering message, then be sent to the former mtc-iwf in hplmn by the triggering report of this terminal.
Referring to Fig. 6, the embodiment of the present invention provides a kind of core network control equipment, and this core network control equipment includes:
Downlink transfer unit 60, for sending out the downstream message receiving from acting on behalf of mtc-iwf according to existing method
See off;Act on behalf of the mtc-iwf of setting in the vplmn that mtc-iwf is currently located for terminal;
Uplink unit 61, the upstream message for sending the terminal receiving is sent to acts on behalf of mtc-iwf.
Further, this core network control equipment also includes:
Roaming judging unit 62, for be sent in the upstream message sending the terminal receiving act on behalf of mtc-iwf it
Before, according to the imsi of this terminal carrying in upstream message, judge whether terminal is in roaming state;
Uplink unit 61 is used for: in when being judged as YES of judging unit of roaming, upstream message is sent to agency
Mtc-iwf, sends upstream message when being judged as NO according to existing procedure.
Further, this core network control equipment also includes:
Information searching unit 63, before being sent to upstream message and act on behalf of mtc-iwf in uplink unit, from this
The information acting on behalf of mtc-iwf serving this core network control equipment is searched in the configuration information on ground;
Accordingly, uplink unit 61 is used for: the information being found according to information searching unit, and upstream message is sent
Acted on behalf of mtc-iwf.
Referring to Fig. 7, the embodiment of the present invention provides the data transmission method being directed under the roaming scence of former mtc-iwf, including
Following steps:
Step 70: the former mtc-iwf being arranged in hplmn will receive the downstream message from scs, be sent to agency
mtc-iwf;Act on behalf of the mtc-iwf of setting in the vplmn that mtc-iwf is currently located for terminal;
Step 71: former mtc-iwf is sent to described scs from the upstream message acting on behalf of mtc-iwf by receiving.
It should be noted that not having strict time sequencing between step 70 and step 71, namely step 71 can be in step
Execution after rapid 70, it is also possible to execute before step 70, be can also be and executed with step 70 simultaneously.
Preferably, in step 70, under the former mtc-iwf in the hplmn being arranged on terminal will receive from scs
Row message, is sent to before acting on behalf of mtc-iwf, and former mtc-iwf obtains the information of the service node of terminal from hss, according to acquisition
The information of service node judge whether terminal is in roaming state;When judging that terminal is in roaming state, by downstream message
It is sent to and act on behalf of mtc-iwf.
Specifically, in step 70, downstream message is sent to and acts on behalf of mtc-iwf, be implemented as follows: according to the clothes obtaining
The information of business node, searches the information acting on behalf of mtc-iwf serving this service node in vplmn;According to the information finding,
Downstream message is sent to and acts on behalf of mtc-iwf.
Preferably, before downstream message is sent to acting on behalf of mtc-iwf, using the core net of the service node as terminal
The information of control device, carries in downstream message.
Referring to Fig. 8, the embodiment of the present invention provides the data transmission method being directed under the roaming scence acting on behalf of mtc-iwf, bag
Include following steps:
Step 80: the downstream message receiving from former mtc-iwf is sent out by the mtc-iwf that acts on behalf of being arranged in vplmn
Give core network control equipment;Former mtc-iwf is the mtc-iwf arranging in the hplmn of terminal;
Step 81: act on behalf of mtc-iwf by receiving and be sent to former mtc- from the upstream message of core network control equipment
iwf.
It should be noted that not having strict time sequencing between step 80 and step 81, namely step 81 can be in step
Suddenly execution after 80s, it is also possible to execute before step 80, be can also be and executed with step 80 simultaneously.
Specifically, the downstream message receiving from former mtc-iwf is sent to core acting on behalf of mtc-iwf in step 80
The information of core network control equipment before heart network control control equipment, is obtained by parsing downstream message;The information being obtained according to parsing,
Downstream message is sent to core network control equipment.
Specifically, act on behalf of mtc-iwf in step 81 to send the upstream message receiving from core network control equipment
To former mtc-iwf, it is implemented as follows: act on behalf of mtc-iwf according to the relevant information carrying in upstream message, search this terminal
The information of the former mtc-iwf of setting in hplmn;According to the information finding, upstream message is sent to described former mtc-iwf;
Or,
Act on behalf of mtc-iwf and the interface of foundation between mtc-iwf and former mtc-iwf is acted on behalf of by this, by coming of receiving
It is sent to former mtc-iwf from the upstream message of core network control equipment;This interface is to act on behalf of mtc- in described former mtc-iwf to this
Iwf sends the interface set up during downstream message.
When acting on behalf of the upstream message that mtc-iwf receives for terminal triggering report, if report is triggered according to this terminal sentencing
The bust thiss of disconnected terminal trigger message, then be not sent to the former mtc-iwf in hplmn by the triggering report of this terminal, but weight
Newly select other core network control equipment, and by the core network control equipment reselecting, terminal trigger message is sent out
Going, thus avoiding the former mtc-iwf being sent to the terminal triggering report of bust thiss in hplmn, further reducing not
With the signalling between plmn, save signal resource.If judge the biography of terminal trigger message according to the triggering report of this terminal
Defeated success, then be sent to the former mtc-iwf in hplmn by the triggering report of this terminal.
Referring to Fig. 9, the embodiment of the present invention provides for the data transmission method under the roaming scence of core network control equipment,
Comprise the following steps:
Step 90: the downstream message receiving from acting on behalf of mtc-iwf is sent by core network control equipment;Agency
The mtc-iwf of setting in the vplmn that mtc-iwf is currently located for terminal;
Step 91: the upstream message that the terminal receiving sends is sent to and acts on behalf of mtc-iwf by core network control equipment.
Preferably, the upstream message that the terminal receiving sends is sent to agency in core network control equipment in step 91
Before mtc-iwf, according to the imsi of this terminal carrying in upstream message, judge whether terminal is in roaming state;Judging
When terminal is in roaming state, upstream message is sent to and acts on behalf of mtc-iwf.
Specifically, in step 91, the upstream message that the terminal receiving sends is sent to agency by core network control equipment
Mtc-iwf, is implemented as follows: search from local configuration information serve this core network control equipment act on behalf of mtc-
The information of iwf;According to the information finding, upstream message is sent to and acts on behalf of mtc-iwf.
Downstream message be terminal trigger message, upstream message be to the triggering report of the terminal of terminal trigger message, specifically
Agreement flow process is as follows:
Step one, the former mtc-iwf of hplmn receive terminal trigger message from tsp interface, according to prior art in hss
Find the information of the service node of current ue, and determine whether ue is in roaming state according to the information finding;
Step 2, when former mtc-iwf determines that ue is in roaming state, searched in vplmn according to the id of service node and take
It is engaged in the information acting on behalf of mtc-iwf of this service node;
Terminal trigger message is passed to and is acted on behalf of mtc-iwf by step 3, former mtc-iwf;
Step 4, act on behalf of mtc-iwf according to existing mtc-iwf trigger ue method send terminal trigger message;
Step 5, act on behalf of mtc-iwf the terminal receiving from sgsn/mme/msc triggering report is sent to the mtc- of hplmn
iwf.